US4953828A - Apparatus for practicing a pneumatic suction process permitting drawing cables through sheaths - Google Patents

Apparatus for practicing a pneumatic suction process permitting drawing cables through sheaths Download PDF

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Publication number
US4953828A
US4953828A US07/347,037 US34703789A US4953828A US 4953828 A US4953828 A US 4953828A US 34703789 A US34703789 A US 34703789A US 4953828 A US4953828 A US 4953828A
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Prior art keywords
cap
enlargement
sheath
cables
tractive
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US07/347,037
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English (en)
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Sauro S. Baldecchi
Patrick Bourgin
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/06—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle
    • H02G1/08—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle through tubing or conduit, e.g. rod or draw wire for pushing or pulling
    • H02G1/086—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle through tubing or conduit, e.g. rod or draw wire for pushing or pulling using fluid as pulling means, e.g. liquid, pressurised gas or suction means

Definitions

  • the present invention relates not only to remodeling existing constructions for providing electric installations, but also civil works adapted for the laying of cables in underground sheaths.
  • the positioning of the cables in the sheaths or conduits requires the simultaneous and coordinated action of two people: one draws on the leader while the second guides the entrance of the wires or cables to facilitate penetration into the interior of said conduits.
  • a motor which in this example is a linear motor reduced to its simplest form.
  • This motor should be capable of drawing the maximum number of insulated conductors provided, as a function of the diameter of the sleeve or all types of cables that can be disposed in said sleeve.
  • the present invention thus comprises a tractive element which will be called a "bullet”, because of its form and which, secured directly to the conductors, produces no frictional effect which permits a certain speed of sliding and hence as a result diminishes the resistance due to tension.
  • the latter may be of a typically self-lubricating material such as "nylon” or “teflon” (trademarks).
  • the manipulation of the device according to the invention is simplified because when one uses said device to draw conductive wires from one piece to another, one does not see the arrival of the tractive bullet at the outlet of the sleeve, the user is warned of the arrival of this latter by the characteristic noise made by the vacuum pump when the pneumatic load falls off.
  • the device for practicing the process permits drawing directly conductive cables into a sheath by means of movable elements that are moved by pneumatic means; the displacement is obtained by pneumatic vacuum produced by a vacuum pump coupled to the sleeve by one or several sealed couplings; the movable member is constituted by a tractive bullet constituted of a cap downwardly prolonged by a skirt, said cap being prolonged axially by an anchor shank provided with an opening.
  • the tractive "bullet” comprises a spherical head connected to the cap by an axle which permits establishing a second circumference of contact with the interior of the conduit and thus ensures better guidance along long straight lengths by suppressing oscillation, the axis of movement of the tractive "bullet” corresponding exactly to the axis of said conduit.
  • the tractive "bullet” comprises a hemispherical head.
  • cap or tractive bullet
  • the cap is connected by an axle to a spherical head.
  • the diameter of said spherical head is twice as small as the diameter of the cap or of its skirt.
  • the length of the axle connecting the spherical head and the tractive bullet or ogive is sufficient to permit the spherical head to serve the function of a means to be grasped.
  • the point of this difference of diameter between the spherical head and the cap resides in the fact that the cap stops just at the end of the sleeve while the head leaves the sleeve, which permits pulling the assembly manually by using the head as a means to be gripped.
  • the pressure means comprises compressed gas
  • the coupling has a Y-shape, a portion serves for connection, a branch permits the passage of compressed air and the other branch permits the passage of the conductors.
  • FIG. 1 is a view in elevation of a tractive "bullet" according to the invention.
  • FIG. 2 is a view in elevation of a modification of the tractive "bullet" adapted for long straight lines.
  • FIG. 3 is a view in elevation of a modified form of a Y-shaped connection adapted for the use of compressed air.
  • FIG. 4 is an elevational view of a vacuum connection or sleeve for sheaths of small diameter.
  • FIG. 5 shows the arrival of the tractive bullet or cap at the outlet of the sheath at the level of the connection with the vacuum pump. This figure shows the difficulty at this point of grasping the cap.
  • FIG. 6 shows the use of the spherical head of diameter smaller than the diameter of the cap and which serves as a means to be grasped at the outlet of the sheath.
  • FIG. 7 is a transverse cross section of a cap provided with a spherical head serving as the means to be grasped.
  • FIG. 1 shows in an elevational view a tractive "bullet" which is a body of revolution in a self-lubricating material. It is constituted by a cap 1 of rounded shape permitting the passage through bends of sheaths without jamming and with a minimum of friction.
  • This cap 1 is prolonged downwardly by a skirt 2 adapted to ensure sealing between the cap 1 and the interior of the sleeve (not shown).
  • a skirt 2 adapted to ensure sealing between the cap 1 and the interior of the sleeve (not shown).
  • an axial elongation or anchor 3 provided with a hole 4 in the form of an opening permitting the simultaneous reception of several conductors or cables.
  • This member is of one-piece construction.
  • FIG. 2 is an elevational view of a modification of the tractive "bullet" adapted for long straight lines to ensure better guidance and suppression of all oscillatory phenomena. Thanks to the presence of a head 5 of spherical form, there is provided a second contact circumference with the interior of the conduit, and so the axis of movement of the tractive "bullet” corresponds exactly to the axis of said conduit.
  • Head 5 is connected to cap 1 by an axle 6.
  • Skirt 2 and anchor 3 in which the opening 4 is provided are all similar to FIG. 1.
  • FIG. 3 shows an elevational view of a modification of a coupling of "Y" shape adapted for the use of compressed air.
  • the coupling is of a semi-flexible or self-lubricating material so as to reduce friction due to misalignment between the cable leaving its bobbin and entering into the sheath, whose connection is effectuated by the portion 7.
  • the branch 8 serves to receive compressed air, while the branch 9 permits the passage of the conductors.
  • This branch 9 has at its extremity a non-return valve 10 which has the purpose of preventing excessive loss of air which would involve too great a loss of compression.
  • this connection is subject to the same criteria of minimum friction as the device for practicing the process involving vacuum.
  • FIG. 4 shows an elevational view of a coupling or vacuum sleeve for sheaths of diameters smaller than the diameter of the tube of the vacuum pump.
  • the portion 11 adapted to be inserted in sealed relation within the sheath may be elbowed, semi-rigid or flexible by being constructed of rings.
  • Portion 12 serves to receive the usual conical end of a vacuum tube adapted to create a vacuum in "A".
  • cap 13 does not have a spherical head 14. Cap 13 thus stops just at the end 15 of the sheath 16 and at the point of connection 17 of the vacuum pump 18.
  • the cap 13 has a spherical head 14.
  • Cap 13 stops just at the end 15 of sheath 16, the spherical head 14 thanks to its axle 19 which connects it to the cap extends beyond the end 15 which permits utilizing said head 14 as a means to be grasped and easily pulled to draw the assembly to recover the end of the conductive cables.
  • FIG. 6 shows that the diameter 20 of the spherical head is twice as small as the diameter 21 of the cap 13.

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  • Electric Cable Installation (AREA)
US07/347,037 1987-11-20 1989-05-04 Apparatus for practicing a pneumatic suction process permitting drawing cables through sheaths Expired - Lifetime US4953828A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8716383A FR2623665B1 (fr) 1987-11-20 1987-11-20 Procede a depression pneumatique permettant le tirage des cables dans les gaines et dispositif de mise en oeuvre

Publications (1)

Publication Number Publication Date
US4953828A true US4953828A (en) 1990-09-04

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US07/347,037 Expired - Lifetime US4953828A (en) 1987-11-20 1989-05-04 Apparatus for practicing a pneumatic suction process permitting drawing cables through sheaths

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US (1) US4953828A (fr)
EP (1) EP0325882A1 (fr)
FR (1) FR2623665B1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5121644A (en) * 1990-02-14 1992-06-16 Stc Plc Deploying cables in pipelines
WO2005018067A1 (fr) * 2003-08-13 2005-02-24 John Michael Holtzhausen Procede et dispositif d'enfilage dans un conduit
US20080272350A1 (en) * 2007-05-04 2008-11-06 Ming-Chun Lu Device for Conduiting and Piping and a Shuttle
CN110994472A (zh) * 2019-12-17 2020-04-10 广东蕉岭建筑工程集团有限公司 一种电气线管穿引线的方法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ225552A (en) * 1988-10-01 1992-04-28 Bradley Colin Frank Cable laying apparatus: cable drawn through duct by suction
AUPN971396A0 (en) * 1996-05-07 1996-05-30 Pneumatic Systems International Pty Ltd Shuttle for use in insertion of a draw line
AU738302B2 (en) * 1996-05-07 2001-09-13 Pneumatic Systems International Pty Ltd Shuttle for use in insertion of a draw line into a conduit
FR2750264A1 (fr) * 1996-06-25 1997-12-26 Leon Jean Tire-cable pour l'introduction d'un cable dans une gaine
US11509130B2 (en) 2021-02-10 2022-11-22 Qualcomm Incorporated Disconnection arc prevention in cable-supplied power connection

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US920455A (en) * 1906-12-14 1909-05-04 Nat Water Main Cleaning Company Device for passing cables through pipe-lines.
US2980399A (en) * 1958-06-30 1961-04-18 Kendall M Littlefield Flow propelled sewer or pipe threader
US3091433A (en) * 1961-10-02 1963-05-28 Black & Decker Mfg Co Vacuum-actuated apparatus and method for drawing lines through a pipe or conduit
DE2247493A1 (de) * 1972-09-28 1974-04-11 Manfred Schenk Vorrichtung zum durchfuehren eines seiles, fadens oder drahtes durch ein installationsrohr
US4083533A (en) * 1976-01-12 1978-04-11 Lois I. Oaden Technique for placing tensile elements in conduits
GB2152621A (en) * 1984-01-09 1985-08-07 John Edmund Dawe A method of threading an elongate flexible element through an elongate passage
FR2577724A1 (fr) * 1985-02-14 1986-08-22 Lignes Telegraph Telephon Procede de mise en place pneumatique d'un filin dans un fourreau et dispositif de mise en oeuvre
US4783054A (en) * 1986-05-30 1988-11-08 Establissements Morel - Ateliers Electromecaniques De Favieres Pneumatic device for fitting cables in a tube

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1950645A1 (de) * 1969-10-08 1971-04-15 Franz Wolff Vorrichtung zum Durchziehen der Zugleine fuer Kabel oder Leitungen durch Kabel- bzw. Leitungsrohre
US3793732A (en) * 1970-07-29 1974-02-26 Jet Line Prod Inc Method and apparatus for installing heavy electrical conductor lines in conduits
BE754762A (fr) * 1970-08-12 1971-01-18 Bellinghen Andre J J J Van Dispositif de lancement d'une corde ou un fil a travers au moins un element tubulaire,
DE2330844A1 (de) * 1973-06-16 1975-01-02 Huels Chemische Werke Ag Verfahren und vorrichtung zum einziehen von kabeln, leitungen und dergleichen in rohre
US3927866A (en) * 1974-10-11 1975-12-23 Greenlee Bros And Co Pneumatic blow gun for installing fishing line, measuring tape and polyethylene pull line in electrical conduit
GB2151414B (en) * 1983-12-12 1987-04-23 Kao Chiang Teng Apparatus for feeding cable through a conduit

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US920455A (en) * 1906-12-14 1909-05-04 Nat Water Main Cleaning Company Device for passing cables through pipe-lines.
US2980399A (en) * 1958-06-30 1961-04-18 Kendall M Littlefield Flow propelled sewer or pipe threader
US3091433A (en) * 1961-10-02 1963-05-28 Black & Decker Mfg Co Vacuum-actuated apparatus and method for drawing lines through a pipe or conduit
DE2247493A1 (de) * 1972-09-28 1974-04-11 Manfred Schenk Vorrichtung zum durchfuehren eines seiles, fadens oder drahtes durch ein installationsrohr
US4083533A (en) * 1976-01-12 1978-04-11 Lois I. Oaden Technique for placing tensile elements in conduits
GB2152621A (en) * 1984-01-09 1985-08-07 John Edmund Dawe A method of threading an elongate flexible element through an elongate passage
FR2577724A1 (fr) * 1985-02-14 1986-08-22 Lignes Telegraph Telephon Procede de mise en place pneumatique d'un filin dans un fourreau et dispositif de mise en oeuvre
US4783054A (en) * 1986-05-30 1988-11-08 Establissements Morel - Ateliers Electromecaniques De Favieres Pneumatic device for fitting cables in a tube

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5121644A (en) * 1990-02-14 1992-06-16 Stc Plc Deploying cables in pipelines
WO2005018067A1 (fr) * 2003-08-13 2005-02-24 John Michael Holtzhausen Procede et dispositif d'enfilage dans un conduit
US20070034844A1 (en) * 2003-08-13 2007-02-15 Holtzhausen John M A Conduit Threading Device And Method
US7311296B2 (en) 2003-08-13 2007-12-25 John Michael Holtzhausen Conduit threading device and method
US20080272350A1 (en) * 2007-05-04 2008-11-06 Ming-Chun Lu Device for Conduiting and Piping and a Shuttle
CN110994472A (zh) * 2019-12-17 2020-04-10 广东蕉岭建筑工程集团有限公司 一种电气线管穿引线的方法

Also Published As

Publication number Publication date
FR2623665A1 (fr) 1989-05-26
EP0325882A1 (fr) 1989-08-02
FR2623665B1 (fr) 1996-10-31

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